Heat oil in large heavy skillet over medium-high heat. Add pork chops and cook, turning once, until cooked through, about 6 minutes each side. Remove chops to serving platter and keep warm.
Add garlic and shallots to skillet and cook, stirring constantly, 1 minute. Pour in cider and applejack; cook over high heat until thickened, about 5 minutes. Add vinegar, thyme, Dijon mustard and salt and pepper; stir until completely blended. Spoon sauce over pork chops and serve at once.